Process belt with variably adjustable release characteristics

Abstract

A transport belt, in particular for machines for the production of web material such as paper or paperboard, which on a web material contact side ( 18 ) includes at least two material layers ( 20, 22, 24 ) of different material arranged one above the other, wherein prior to starting up for the first time the transport belt ( 10 ) is subjected on its web material contact side ( 18 ), at least in some regions, to a material-removing process such that the transport belt ( 10 ) has on its web material contact side ( 18 ) a web material contact surface ( 26 ) provided by various material layers ( 20, 22, 24 ).

1. A transport belt for the production of web material such as paper or paperboard, the transport belt comprising:
 a web material contact side having at least two material layers composed of different materials arranged one above the other, 
 in at least two regions of the transport belt on the web material contact side, the at least two material layers are exposed at a web material contact surface, and 
 a belt core supporting the at least two material layers arranged one above the other. 
 
     
     
       2. The transport belt according to  claim 1 , wherein at least one of the material layers has a thickness in the range from approximately 5 to approximately 50 μm. 
     
     
       3. The transport belt according to  claim 1 , wherein at least one of the material layers comprises a polyurethane material. 
     
     
       4. The transport belt according to  claim 2 , wherein at least one of the material layers comprises a polyurethane material. 
     
     
       5. The transport belt according to  claim 1 , wherein at least one of the material layers contains a filler material comprising at least one of titanium dioxide, calcium carbonate, graphite, aluminum, or steel. 
     
     
       6. The transport belt according to  claim 2 , wherein at least one of the material layers contains a filler material comprising at least one of titanium dioxide, calcium carbonate, graphite, aluminum, or steel. 
     
     
       7. The transport belt according to  claim 3 , wherein the web material contact surface comprises strip-shaped material layers of the various material layers extending side by side in a transport belt longitudinal direction (MD). 
     
     
       8. The transport belt according to  claim 1 , wherein the web material contact surface comprises strip-shaped material layers of the various material layers extending side by side in a transport belt longitudinal direction (MD). 
     
     
       9. The transport belt according to  claim 2 , wherein the web material contact surface comprises strip-shaped material layers of the various material layers extending side by side in a transport belt longitudinal direction (MD). 
     
     
       10. A transport belt for the production of web material such as paper or paperboard, the transport belt comprising:
 a web material contact side having at least two material layers composed of different materials arranged one above the other, and 
 in at least two regions of the transport belt on the web material contact side, the at least two material layers are exposed at a web material contact surface, 
 wherein the web material contact surface comprises strip-shaped material layers of the various material layers extending side by side in a transport belt longitudinal direction (MD). 
 
     
     
       11. A method for manufacturing a transport belt for machines for the production of web material such as paper or paperboard, the method comprising:
 forming on a belt core a transport belt blank having on a web material contact side, at least two material layers composed of different materials arranged one above the other, and 
 processing a surface of the web material contact side to form at least two regions exposing the different material layers thereby forming the transport belt. 
 
     
     
       12. The method according to  claim 11 , wherein the processing a surface of the transport belt blank further comprises the grinding of the transport belt blank on the web material contact side. 
     
     
       13. The method according to  claim 11 , wherein at least one of the material layers has a thickness in the range from approximately 5 to approximately 50 μm. 
     
     
       14. The method according to  claim 13 , wherein at least one of the material layers contains a filler material comprising at least one of titanium dioxide, calcium carbonate, graphite, aluminum, or steel. 
     
     
       15. The method according to  claim 11 , wherein at least one of the material layers comprises a polyurethane material. 
     
     
       16. The method according to  claim 11 , wherein at least one of the material layers contains a filler material comprising at least one of titanium dioxide, calcium carbonate, graphite, aluminum, or steel. 
     
     
       17. The method according to  claim 11 , wherein the surface comprises strip-shaped material layers of the various material layers extending side by side in a transport belt longitudinal direction (MD).